Vim li cas kev cai PCB tooj liab plating nto npuas?

Vim li cas kev cai PCB tooj liab plating nto npuas?

Kev cai PCBdeg bubbling yog ib qho ntawm ntau qhov tsis zoo hauv cov txheej txheem ntawm PCB.Vim yog qhov nyuaj ntawm PCB cov txheej txheem tsim khoom thiab cov txheej txheem kev saib xyuas, tshwj xeeb tshaj yog nyob rau hauv cov tshuaj ntub dej, nws yog ib qho nyuaj rau kev tiv thaiv cov bubbling tsis xws luag ntawm lub rooj tsavxwm.

Lub bubbling ntawmPCB pawg thawj coj saibQhov tseeb yog qhov teeb meem ntawm kev sib raug zoo tsis zoo ntawm lub rooj tsavxwm, thiab los ntawm kev txuas ntxiv, qhov teeb meem ntawm qhov zoo ntawm lub rooj tsavxwm, uas suav nrog ob yam:

1. PCB deg cleanness teeb meem;

2. Micro roughness (los yog lub zog nto) ntawm PCB nto;tag nrho cov teeb meem bubbling ntawm lub rooj tsav xwm hauv Circuit Court tuaj yeem ua tiav raws li cov laj thawj saum toj no.Kev sib khi quab yuam ntawm cov txheej txheej tsis zoo los yog tsawg dhau, hauv kev tsim khoom thiab kev ua haujlwm tom ntej thiab cov txheej txheem sib dhos yog qhov nyuaj los tiv thaiv cov txheej txheem ntau lawm thiab ua cov txheej txheem tsim tawm hauv cov txheej txheem kev ntxhov siab, kev ntxhov siab thiab kev ntxhov siab thermal, thiab lwm yam, ua rau sib txawv. degrees ntawm kev sib cais ntawm txheej txheej tshwm sim.

Qee yam uas ua rau tsis zoo ntawm qhov chaw hauv PCB ntau lawm thiab kev ua tiav tau sau tseg raws li hauv qab no:

Kev cai PCB substrate - tooj liab-clad phaj txheej txheem kho teeb meem;Tshwj xeeb tshaj yog rau qee qhov nyias nyias (feem ntau hauv qab 0.8 hli), vim tias lub substrate rigidity tsis zoo, tsis zoo siv txhuam txhuam phaj tshuab, nws yuav tsis tuaj yeem tshem tawm cov substrate kom tsis txhob muaj qhov oxidation ntawm tooj liab ntawv ci hauv cov txheej txheem ntau lawm. thiab kev ua thiab txheej txheej tshwj xeeb, thaum txheej txheej yog thinner, txhuam phaj yog yooj yim tshem tawm, tab sis cov tshuaj ua haujlwm nyuaj, Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum tau them sai sai rau kev tswj hwm hauv kev tsim khoom thiab kev ua haujlwm, thiaj li tsis ua rau muaj teeb meem. ntawm foaming tshwm sim los ntawm qhov tsis zoo binding quab yuam ntawm substrate tooj liab ntawv ci thiab cov tshuaj tooj liab;Thaum cov txheej txheej hauv nyias yog blackened, kuj tseem yuav ua tsis zoo blackening thiab browning, xim tsis sib xws, thiab tsis zoo hauv zos blackening.

PCB board nto nyob rau hauv cov txheej txheem ntawm machining (drilling, lamination, milling, thiab lwm yam) tshwm sim los ntawm cov roj los yog lwm yam kua plua plav paug nto kev kho mob tsis zoo.

3. PCB tooj liab sinking txhuam phaj tsis zoo: lub siab ntawm cov phaj sib tsoo ua ntej tooj liab tog yog loj heev, ua rau lub qhov deformation, thiab tooj liab foil fillet ntawm lub qhov thiab txawm tias cov ntaub ntawv hauv paus to ntawm lub qhov, uas yuav ua rau npuas. phenomenon ntawm lub qhov nyob rau hauv tus txheej txheem ntawm tooj liab sinking, plating, tin spraying thiab vuam;Txawm hais tias cov txhuam hniav tsis ua rau cov dej xau ntawm cov substrate, cov phaj txhuam ntau dhau yuav ua rau cov roughness ntawm lub qhov tooj liab, yog li nyob rau hauv cov txheej txheem ntawm micro-corrosion coarsening, cov ntawv ci tooj liab yog ib qho yooj yim los tsim ntau coarsening tshwm sim, muaj. tseem yuav muaj kev pheej hmoo zoo;Yog li ntawd, kev saib xyuas yuav tsum tau them nyiaj rau kev ntxiv dag zog rau kev tswj cov txheej txheem txhuam phaj, thiab cov txheej txheem txhuam phaj tuaj yeem hloov kho kom zoo tshaj plaws los ntawm kev hnav cov cim ntsuas thiab cov yeeb yaj kiab dej.

4. Cov teeb meem ntxuav PCB: vim tias hnyav tooj liab electroplating ua yuav tsum dhau ntau cov tshuaj ua kua tshuaj ua haujlwm, txhua yam ntawm cov kua qaub-puag cov organic hnyav xws li tshuaj, board lub ntsej muag ntxuav tsis huv, tshwj xeeb tshaj yog hnyav tooj liab hloov ntxiv rau. cov neeg sawv cev, tsis tsuas yog tuaj yeem ua rau muaj kev sib kis kab mob sib kis, tseem yuav ua rau lub rooj tsavxwm ntsib kev ua haujlwm hauv zos lossis kev kho mob tsis zoo, qhov tsis zoo ntawm qhov tsis sib xws, ua rau qee qhov kev sib khi quab yuam;Yog li ntawd, kev saib xyuas yuav tsum tau them nyiaj rau kev ntxiv dag zog rau kev tswj kev ntxuav, feem ntau suav nrog kev tswj xyuas cov dej huv, dej zoo, lub sijhawm ntxuav, thiab lub sij hawm poob ntawm cov phaj phaj;tshwj xeeb tshaj yog nyob rau lub caij ntuj no, qhov kub thiab txias yog qhov tsawg, cov nyhuv ntawm kev ntxuav yuav txo qis heev, yuav tsum tau them nyiaj ntau rau kev tswj kev ntxuav.